Arc-lamp.



C. HENRICHSEN.

ARC LAMP.

APPLICATION FILED JULY 11. 1913.

1,1 59,765. Patented Nov. 9, 1915.

Witnesses Mama W J9 COLUMBIA PLANOGRAIH C04, WASHINGTON, D. c.

lm/entor Christian Henrichsen 1 His oittorneg UNITED STATES PATENT OFFICE.

CHRISTIAN HENB-ICHSEN, OF PITTSFIELD, MASSACHUSETTS, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

ARC-LAMP.

Application filed July 11, 1913.

To all whom it may concern.-

Be it known that I, CHRISTIAN HENRIGH- SEN, a subject of. the King of Denmark, re-- siding at Pittsfield, county of Berkshire, State, of Massachusetts, have invented certainnew and useful Improvements in Arc- Lamps, of which the following is a specification.

My invention has reference to an inclosed flame arc lamp. In lamps of this character, electrodes are used which contain mineral salts or compounds, and an are supported by such electrodes evolves solidifiable products ofcombustion, which readily deposit on any surface with which they come in contact, and when they deposit upon the inclosing globe, they obstruct the light and reduce the efliciency of the lamp.

Oneobject of. my'invention is the provision of a novel form of arc inclosure comprising a condensing chamber located above and remote from the. globe, the whole being so constructed as to-produce a vigorous circulation of the gases evolved from the are above the globe where most of the condensable fumes: are deposited. The fumes are thus largely relieved of their condensable productsof combustion, and when the purified gases return to the globe, little if any deposit takes place on that part of the globe through which the light passes.

Another object of my invention is the provision of a structure which produces a circulation of the character above indicated and to which access is readily had for the purpose of cleaning the same.

Other novel features of my invention will appear in the specincaition and will be pointed out inthe claims.

For a fuller understanding of my invention, reference may be had to the accompanying drawing, which represents a vertical sectional view of a lamp showing the preferred form of my invention.

The lamp is supported from a top plate 1 by a bail or strap 2, which is suspended by the usual pulley 3 of insulating material. A central draft tube i is externally threaded at its upper end and is received within an internally screw-threaded flange 5 on the top plate 1., The upper end of the draft tube is provided with openings 6 for a purpose hereinafter more fully set forth. The upper end of a hood 7 for the collection of. the fumes. evolved from the arc is received Specification of Letters Patent.

Patented Nov. 9, 1915.

Serial No. 77s,50e.

around the lower end of the draft tube 4t.

and suitably secured thereto. An annular bottom plate 8 is secured to the lower edge of the hood 7.

An economizer 9 of copper or other suitable material is supported by means of a bolt 10 from a frame 11 comprising a number of substantially vertical or slightly inclined ribs 11 and a cylindrical ring 12 at the upper end, which ring is received within the draft tube 4. The lower ends of the ribs are provided with horizontal extensions 11 which are suitably secured to the hood 7. A bushing 13. of lava or other refractory material is received within a central opening in the economizer 9 and closely surrounds theupper electrode 14.

A condensing chamber 15, which is of large superficial area and exposed to the atmosphere, is located above and remote from thearc-inclosing globe; it is made of two shells 16, 17, which join in a horizontal plane. The upper and lower shells are secured together by clamps 18 pivoted at 19 on. lugs secured to the upper shell and engaging lugs 20 on the lower shell.

7 An annular plate 21 having downwardly extending flanges at its inner and outer edges issecured to the draft tube immediately below the openings 6. A cylindrical inner casing 22 is received at its upper end over the annular plate 21 and at its lower end over, the bottom plate 8 and forms a substantially air-tight joint with both of these plates.

An outer shell 23, which constitutes an ornamental casing for the lamp is spaced from the inner casing 22 and secured thereto by studs 21 and is secured to and supported from the lower shell 17 of the condensing chamber and forms, with the inner casing, an annular space 25 which communicates above with the condensing chamber and be low with the inclosing globe.

A reflector 26 of any suitable form is secured to the lower part of the outer casing 23' and supports and forms a substantially air-tight fit with an annular plate 27 against which the globe 28 is seated.

The upper end of the upper electrode 1% is received within a weighted electrodeholder 29 which is preferably mace triangular in: form so as to permit the fumes evolved. from the arc to pass the electrodeholder within the draft tube. The electrode holder 35 carried by an electrode supporting.

rod 36 which passes through a sleeve 57 in thebottom plate 8. The'upper end ofthe rod 36 is provided with a guide block 38 hav ing a roller 39 which engages a guide rod 40 extending between the top and bottom plates of the lamp. The block 38 is suspended by a flexible connection 41 from a second sheave 42 of the pulley 32, the connection 41 passing through a sleeve 45 secured in the top plate 1 and. annular plate 21. The clutch pulley 32 is provided with an arm 4:3 to which is pivoted a link l4: extending to the operating mechanism of the lamp which'is located between the draft'tube and the inner casing 22.

I have not here shown the operating mechanism of the lamp nor the details of the clutch mechanism, since these form no part of my invention and since any well known clutchpulley and operating mechanism may be used, as is well understood by those skilled in the art. i V

. The lower shell of the condensing cham-' hers is preferably provided with an annular rim 46 which holds in position pieces 47 of any suitable material, such as lime, whichare preferably used for absorbing noxious gases and moisture and thereby preventing or tending to prevent'the fumes from etching the globe.

In operation the fumes evolved from the arc ascend around the economizer Qandare collected in the hood 7 and then pass-upwardly through the draft tube tand through the'openings 6 in the top thereof to the condensing chambers 15. The gases are cooled in this chamber and are relieved of much of their solidifiable products of combustion and the gases thus cooled'and purified pass downwardly through the passage 25 formed between the two casings 22 and 23 to the top of the inclosing globe.

r I havefound in practice that the struc ture embodied in my invention and comprisinga condensing chamber located above'and remote from the arc inclosing globe induces a vigorous circulation of the gases evolved from the are which is beneficial in preventing deposits on the inclosing globe; the large radiating surface of the outer casing contributes to this result. In any case, I find in actual practice that the globe in a lamp embodying my invention remains remarkably clean.

In accordancewith the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but

I desire to have it understood that theapparatus shown is only illustrative, and that.

the globe and having lateral openings at its top communicating with said condensing chamber, and two shells concentric with said draft tube andforming an annular passage communicating with the globe and with said condensing chamber. 1 V

2.1a an arc lamp, top and bottom plates for the'lamp, a circulatory system for the gases evolved fromthe arc comprising a horizontally divided condensing chamber, theupper part of which is seated against and supported from the top plate, an annular plate supported from the top plate, two shells secured together and supported from the lower part of the condensing chamber, the inner shell being received over the bottom plate and said annular'plate, and a globe supported by the outer shell, the shells being suitably spaced apart to'form an annular passage between the condensing chamber and said globe, and means for securing the lower part of the condensing chamber against the upper.

3. Inan arc lamp, top' and bottom plates for the lamp, a horizontally divided condensing chamber, the upper part of which is seated against and supported from the top plate, a central draft tube secured to the top plate, an annular plate secured about said 'draft tube and forming a part of the condensing chamber, two spaced circular shells secured together, the inner of which is received over the bottom plate and said circular plate, and the outer of which is supported from the lower part of the condensing chamber, and a globe supported'from the outer shell, the two shells forming an annular passage communicating with the globe and the condensing chamber and forming, with the globe, draft tube and condensing chamber, a substantially air-tight arc inclosure.

4. In an arc lamp, top and bottom plates, a condensing chamber seated against and supported by the top plate, a central draft tube secured to the top plate and forming the back bone of the lamp and communicating with the. condensing chamber, andtwo spaced shells secured together" and supported from the condensing chamber and forming a passage which communicates with the condensing chamber, a globe surrounding the are communicating with said draft tube and with said passage, and a clutch pulley mounted upon the top plate from which one of the electrodes is suspended Within said draft tube, and a sleeve passing through the condensing chamber through which the other electrode is suspended.

In Witness whereof, I have hereunto set my hand this 7th day of July, 1913.

CHRISTIAN HEJPJCHSEN Witnesses R. T. CI-IEESEMAN, .J'. P. CATLIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

